Liquid gun



March 7, 1933. V H A RQSELUND 1,900,668

v LIQUID GUN Filed March 19, 1932 Emma TM Patented Mar. 7, 1933 nNrrEoSTATES PAT-ENT- OFFICE HAROLD A. ROSELUND, O13 TOLEDO, OHIO, ASSIGNOB TOTHE DE VILZBISS COMPANY,

OF TOLEDO, OHIO, A CORPORATION OF OHIO LIQUID GUN 7 Application filedMarch 19, 1232. Serial No.-599,898.

This invention relates to liquid-ejecting means, and particularly tothose oft-he guntype, and has for its object the provision of a simple,eflicient and improved devlce of this character, which is particularlyadapted for and provides a convenient and'economical' means of applyingpenetrating or other lubricating liquids in a fine stream and w1thconsiderable force to springs, shackles, body conl nections, seams, andother points of automo-' biles requiring lubrication. v r

The invention is fully described in the following specification, and animproved embodiment thereof is illustrated 1n the accom- 1 panyingdrawing, in which Figure 1 is a side elevation of a device embodying theinvention, with parts broken away. Fig. 2 is an enlarged longitudinalsec- .tional detail of the nozzle portion of the device,-and Fig. 3 isan enlarged section on the line 3 3 in Fig. 1.

Referring to the drawing, 1 designates a receptacle for containing theliquid to be ap plied, the top of which receptacle is provided with anopen neck 2 to which the lower end of a head member or handle 53 isthreaded, or otherwise suitably attached, to permit easy separationthereof. The member 3 is vertically elongated and fashioned to adapt itto form a handle to be grasped by the hand of the operator, and ishollow to provide a space 4 therein from its lower end to near its top.

A bore 5 is provided in the upper end of .the head 3 in angular relationto its vertical or longitudinal axis, and projecting from the outer endof this bore is a discharge tube 6 which terminates at its outer end ina nozzle 7 having a fine discharge orifice 8 therein,

preferably spaced from the outerend of the nozzle by a cavity 9.

A liquid supply tube 10 extends from the inner end of the bore 5 downthrough the space 1 and into the receptacle 1 where it con- V nects witha pump body 11 and communicates with the bottom. portion of thecylinder12 thereof through a passage 13. The cylinder 12 has an inletpassage 14 in its bottom in communication with the interior of thereceptacle 1, and this passage is normally closed by an inwardly openingcheck-valve 15, while the passage 13 is normally closed by an outwardlyopening check-valve 16.

' The tube 10 is held centered in the lower end portion of the headspace 4 by a disc 17 which is held seated against a shoulder in the headmember 3 by a gasket;18, which in turn seats on the upper end of thereceptacle neck 2 when the head member is mounted thereon. The'lower endof thetube 10 ear ries the pump body 11 so that the latter is removedwith the tube 10 from the receptacle when the head member isdisconnected therefrom. V The disc 17, in addition to centering theliquid tube 10, also serves to prevent oil from entering the hollow head3 in case the gun is upset.

A plunger 19 is mounted in the pump cylinder 12 and has an operatingstem 20 extending upward therefrom through the disc 17 and to near theupper end of the head space 45 where it is engaged by an operating lever21? This lever, in the present instance, is of U or forked-form, beingfulcrumed, in thepresent instance, near its closed end on a pin 22in theupper end of the space 4, and has its legs straddling the upper endportion of the tube 10 and also the upper end of the rod 20, andprovided in their free end portions with downwardly opening notches 23,which receive respective ends of a cross pin 24 on the rod 2O. Theclosed end of the lever 21 projects into'a side opening 25 in the head3, and i is engaged therein by an' operating trigger 26, which extendsdownwardly from said opening without the head 3 in position to begrasped and operated by the first, or first and second, fingers of ahand grasping the head; The trigger 26 is fulorumed on apin 27 and has ar-earwardly extending finger 28 near itsfulcrum, which engages under theclosed end of the lever 21, whereby an inward movement of the trigger 26will actuate the lever 21 to impart a downward movement to the rod 20and its plunger, thus forcing liquid from the pump cylinder outward toand from the nozzle 7 through the communicating passages. The rod 2 isnormally held in raised position by the action of a compression spring29 thereon, thus normally retaining the'operating parts in the positionsshown in Fig. 1.

The outward movement of the trigger 26 relative to the head is limitedby its shouldered coaction with the head, as at 30.

This manner of connecting the trigger to the plunger rod provides asimple and efficient means for communicating a rapid and forcefulliquid-discharging movement to the plunger from a slight movement of thetrigger, and also provides a compact assembly of parts. The relativelengths of the arms of the lever 21, as shown, enables a slight movementof the trigger to impart a considerably greater movement to the plunger.While this feature appears simple, it is quite important in practice, asit enables an operator to secure a considerable movement of the plungerby only slight movement of his fingers, thus making it possible for himto reciprocate the trigger to maintain a power- ;ful dischargingpressureof the liquid without the tiring action that would otherwise occur.

The discharge nozzle embodies a cleaning feature which enables thenozzle orifice to be easily and quickly cleaned, should it becomeclogged by the presence of small particles of dirt, or other matter inthe liquid being sprayed. This clogging is bound to frequently occur indevices of this class, due to the small needle-like size of thedischarge In the present instance, the nozzle 7 is reciprocally mountedin the outer end of a nipple, or coupling member, 31, which is threadedat its innerend on the tube 6, and the outqward movement of the nozzlerelative to the nipple is limited by the engagement of a collar orenlargement 32 on the inner end of the former, with a coactingshoulderor stop portion 33 in the latter. A coiled contractile gspring-34: isdisposed within the nippleand acts on the inner end of the nozzle tonormally retain it in projected relationto the nipple. A-stationarycleaner stem-35 is provided coaxially in the nipple 31, with its outerend projecting into abore 36 in the inner end of the =nozzle,-andprovided with a needle projection 37 of substantially thecross-sectional size-and shape as the discharge orifice 8,and-inposition to enter such'orifice 5O gand clean the same of accumulatedmatter when the nozzle is forced inwardly relative to the nipple 31against the tension of the spring 34:. It is apparent thatsuch cleaningof the discharge orifice may beeasily and 55.:zquickl eflected withoutstopping the operation 0 "the .gun by merely pressing inward on thenozzle. The stem 35 is carried by-a spider 38, the annulus of which, inthe present instance, is mounted in the inner end of the ynipp'leandheld firmly against a shoulder therein by its coaction with the innerend of the tube 6 when the nipple is screwed home thereon. The pressureof the oil inthe discharge tube cooperates with the spring 34:

(isg toreturn the nozzle 9 to its forward position.

1. In a device of theclass described, a receptacle, a hollow handlemember mounted on the top of the receptacle, a tube depending from theinterior of the handle down into the receptacle, a pump body carriedthereby and having a cylinder in inwardly opening valvecont-rolledcommunication with the interior of the receptacleandin outwardly openingvalve controlled communication vwit-h said tube, adischarge tube carriedby the handle and in communication with said first tube, a plungeroperating in said cylinder, a rod extendingfrom the plunger up into thehollow of said handle, an operating lever for the rod mounted in thehandle, a control trigger carried by the upper end portion of the handlein operating connection with said lever, whereby an inward movement ofthe trigger will impart a downward movement of the plunger, and meansnormally retaining the plunger in raised position.

2. In a device ofthe class described, areceptacle having an open neck, ahollow head member of vertically elongated form detachably mountedonsaid neck and forming .a handle, means forming a pump cylinder andsuspended from the head member into the receptacle, said means havinginwardly opening valve-controlled communication with the receptacle,means forming an outwardly opening valve-controlled discharge passagefrom said cylinder up through a portion of said member and from theouter end-thereof, a. plunger .in the cylinder, a stem projecting fromsaid plunger upwardly into the head member to near the upper endthereof, a spring acting .on said rod to normally retain it in raisedposition, a trigger f-ulcrumed .to the upper .end .portion of the headmember and extending downward therefrom at the outer side thereof, alever fulcrumed within the upper end portion of the head member andconnecting said triggerand rod, whereby an inward movement-ofthe triggerwill impart a downward movementito the rod.

3. In a device of the class described, a 11'6- ceptacle, a hollow headmember-detach-ably mounted thereon in vertically extended relation tothereceptacle toform a hand-grip, a discharge nozzle carried by the outerend of the head, means formin a pump cylinder within the receptacle andhaving inwardly opening valve-controlled communication with thereceptacle, and having a tube extending upwardly into the head member incommunication with said nozzle and in outwardly opening valve-controlledcommunication with said cylinder, a plunger in said cylinder, a rodextending upwardly from the plunger into the head member to near theupper end thereof, means normally moving the rod in one direction, aU-shaped lever mounted in the upper end of the head member in straddlingrelation to said tube and Having the free ends of its legs engaged tosaid rod, the fulcrum of said lever being at the op 0- site side of saidtube to said rod, and a tugger pivoted to the upper end portion of thelever with an operating part projecting with out the head member andwith a part projecting into said member and engaging the looped end ofsaid lever, whereby an inward movement of the trigger will impart arodactuating movement to the lever in opposition to said other actuatingmeans.

In testimony whereof I have hereunto signed my name to thisspecification.

HAROLD A. ROSELUND.

